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文章名     作者     期刊名     摘要     卷     期         如果没有找到您所需要的文献，请点击 ——此处申请     共70条记录   Total Synthesis of Incarvilleatone and Incarviditone: Insight into Their Biosynthetic Pathways and Structure Determination [作者：ZHAO KUN; CHENG GUIJUAN; YANG HONGZHI; SHANG HAI; ZHANG XINHAO; WU YUNDONG; TANG YEFENG,期刊：Organic Letters, 页码：4878-4881 , 文章类型： Article，,卷期：2012年14-18] A concise biomimetic total synthesis of incarvilleatone and incarviditone is achieved in one pot via the highly stereoselective hetero- and homodimerization of (+/-)-rengyolone, respectively. The structure of incarvidito... Expansion of Enzymatic Friedel-Crafts Alkylation on Indoles: Acceptance of Unnatural beta-Unsaturated Allyl Diphospates by Dimethylallyl-tryptophan Synthases [作者：LIEBHOLD MIKE; XIE XIULAN; LI SHUMING,期刊：Organic Letters, 页码：4882-4885 , 文章类型： Article，,卷期：2012年14-18] Prenyltransferases of the dimethylallyl-tryptophan synthase (DMATS) superfamily catalyze Friedel-Crafts alkylation with high flexibility for aromatic substrates, but the high specificity for dimethylallyl diphosphate (DM... Synthetic Study of Pyrrocidines: First Entry to the Decahydrofluorene Core of Pyrrocidines [作者：TANAKA RYO; OHISHI KENTARO; TAKANASHI NORIYUKI; NAGANO TOMOHIKO; SUIZU HIROSHI; SUZUKI TAKAHIRO; KOBAYASHI SUSUMU,期刊：Organic Letters, 页码：4886-4889 , 文章类型： Article，,卷期：2012年14-18] The first synthesis of decahydrofluorene core 4 of pyrrocidines was accomplished. The cis,trans-fused tricyclic ring system was stereoselectively constructed via Diels-Alder reaction using two Danishefsky dienes. An "Aprotic" Tamao Oxidation/Syn-Selective Tautomerization Reaction for the Efficient Synthesis of the C(1)-C(9) Fragment of Fludelone [作者：HARRISON TYLER J; RABBAT PHILIPPE M A; LEIGHTON JAMES L,期刊：Organic Letters, 页码：4890-4893 , 文章类型： Article，,卷期：2012年14-18] An efficient synthesis of the C(1)-C(9) fragment of fludelone has been developed. The key step is a tandem silylformylation-crotylsilylation/Tamao oxidation sequence that establishes the C(5) ketone, the C(6), C(7), and ... Efficient Multicomponent Strategy to Pentacyclic Pyrazole-Fused Naphtho[1,8-fg]isoquinolines through Cleavage of Two Carbon-Carbon Bonds [作者：HAO WENJUAN; XU XIAOPING; BAI HUIWEN; WANG SHUNYI; JI SHUNJUN,期刊：Organic Letters, 页码：4894-4897 , 文章类型： Article，,卷期：2012年14-18] Multicomponent reactions of acenaphthylene-1,2-dione with diaroylmethanes and electron-rich pyrazol-5-amines have been discovered. A series of new and polyfunctionalized pentacyclic pyrazole-fused naphtho[1,8-fg]isoquino... Total Synthesis of the Proposed Structure of Mycosporulone: Structural Revision and an Unexpected Retro-Aldol/Aldol Reaction [作者：JUNG MICHAEL E; CHANG JONAH J,期刊：Organic Letters, 页码：4898-4901 , 文章类型： Article，,卷期：2012年14-18] The proposed structure of the fungal metabolite, mycosporulone 1, was prepared starting from the cyclohexenone ester 11 and the D-(R)-glyceraldehyde acetonide 12. The spectroscopic data for both 1 and its C2 epimer la di... Gold-Catalyzed Oxidative Rearrangement of Homopropargylic Ether via Oxonium Ylide [作者：XU MEI; REN TIANTIAN; LI CHUANYING,期刊：Organic Letters, 页码：4902-4905 , 文章类型： Article，,卷期：2012年14-18] Synthetically useful alpha,beta-unsaturated carbonyl compounds were obtained from gold-catalyzed oxidative rearrangement of homopropargylic ether under mild reaction conditions. Gold carbenoid and oxonium ylide are propo... N-Heterocyclic Carbene-Catalyzed Annulation of alpha-Cyano-1,4-diketones with Ynals [作者：ROMANOVMICHAILIDIS FEDOR; BESNARD CELINE; ALEXAKIS ALEXANDRE,期刊：Organic Letters, 页码：4906-4909 , 文章类型： Article，,卷期：2012年14-18] In this paper, the first stereoselective annulation reaction between alpha-cyano-1,4-diketones and ynals, mediated by catalytic amounts of a triazolium salt precatalyst and cocatalytic amounts of a weak carboxylate base,... Selective Esterifications of Primary Alcohols in a Water-Containing Solvent [作者：WANG YONG; ALEIWI BILAL A; WANG QINGHUI; KUROSU MICHIO,期刊：Organic Letters, 页码：4910-4913 , 文章类型： Article，,卷期：2012年14-18] Oxyma and an oxyma derivative, (2,2-dimethyl-1,3-dioxolan-4-yl)methyl 2-cyano-2-(hydroxyimino)acetate (5b), displayed a remarkable effect on selective esterifications of primary alcohols. A wide range of carboxylic acids... Largely pi-Extended Thienoacenes with Internal Thieno[3,2-b]thiophene Substructures: Synthesis, Characterization, and Organic Field-Effect Transistor Applications [作者：YAMAMOTO TATSUYA; NISHIMURA TAKESHI; MORI TAKAMICHI; MIYAZAKI EIGO; OSAKA ITARU; TAKIMIYA KAZUO,期刊：Organic Letters, 页码：4914-4917 , 文章类型： Article，,卷期：2012年14-18] Two largely pi-extended thienoacenes with internal thieno[3,2-b]thiophene substructures, i.e., bis[1]benzothieno[2,3-d,2',3'-d]benzo[1,2-b;4,5-b']dithiophene (BBTBDT) and bis(naphtho[2,3-b]thieno)[2,3-d;2',3'-d]benzo[1,2... Carbon-Carbon Bond Cleavage in Fluorescent Pyronin Analogues Induced by Yellow Light [作者：STACKO PETER; SEBEJ PETER; VEETIL ANEESH TAZHE; KLAN PETR,期刊：Organic Letters, 页码：4918-4921 , 文章类型： Article，,卷期：2012年14-18] A novel class of pyronin analogues, which undergoes a photochemically induced cleavage of the C-C bond in the presence of water in both solution and on a silica gel surface upon direct irradiation with visible fight, is ... Organocatalytic Asymmetric Synthesis of 3-Chlorooxindoles Bearing Adjacent Quaternary-Tertiary Centers [作者：NOOLE ARTUR; JAERVING IVAR; WERNER FRANZ; LOPP MARGUS; MALKOV ANDREI; KANGER TONIS,期刊：Organic Letters, 页码：4922-4925 , 文章类型： Article，,卷期：2012年14-18] A new methodology was developed for the synthesis of enantiomerically enriched 3,3-disubstituted 3-chlorooxindoles 3 via a Michael addition of 3-chloroxindoles to nitroolefins 2, catalyzed by chiral squaramide 10. Produc... 2,4-vs 3,4-Disubsituted Pyrrole Synthesis Switched by Copper and Nickel Catalysts [作者：CHEN FENG; SHEN TAO; CUI YUXIN; JIAO NING,期刊：Organic Letters, 页码：4926-4929 , 文章类型： Article，,卷期：2012年14-18] A novel and efficient copper or nickel catalyzed highly selective denitrogenative annulation of vinyl azides with aryl acetaldehydes has been developed. 2,4- and 3,4-diaryl substituted pyrroles, which are difficult to sy... Pd(II)-Mediated Cyclization of o-Allylbenzaldehydes in Water: A Novel Synthesis of Isocoumarins [作者：CHEN POYUAN; HUANG KENGSHIANG; TSAI CHINCHUAN; WANG TZUPIN; WANG ENGCHI,期刊：Organic Letters, 页码：4930-4933 , 文章类型： Article，,卷期：2012年14-18] A novel, concise and efficient synthesis of substituted isocoumarins is disclosed. o-Allylbenzaldehydes prepared from isovanillin were mediated by PdCl2-CuCl2 in water to undergo a domino reaction sequence, including 6-e... Rhodium-Catalyzed [2+2] Cycloaddition of Ynamides with Nitroalkenes [作者：SMITH DONNA L; CHIDIPUDI SURESH REDDY; GOUNDRY WILLIAM R; LAM HON WAI,期刊：Organic Letters, 页码：4934-4937 , 文章类型： Article，,卷期：2012年14-18] In the presence of a diene-ligated rhodium complex, ynamides and nitroalkenes undergo catalytic [2 + 2] cycloadditions to provide cyclobutenamides. The presence of sodium tetraphenylborate was found to be crucial for the... Efficient and Scalable Enantioselective Synthesis of a CGRP Antagonist [作者：LEAHY DAVID K; FAN YU; DESAI LOPA V; CHAN COLLIN; ZHU JASON; LUO GUANGLIN; CHEN LING; HANSON RONALD L; SUGIYAMA MASANO; ROSNER THORSTEN; CUNIERE NICOLAS; GUO ZHIWEI; HSIAO YI; GAO QI,期刊：Organic Letters, 页码：4938-4941 , 文章类型： Article，,卷期：2012年14-18] An enantioselective synthesis of the CGRP antagonist BMS-846372, amenable to large scale preparation, is presented. This new synthesis showcases a chemo- and enantioselective reduction of a cyclohepta[b]pyridine-5,9-dion...